Calipers



W. J. MILLER.

CALIPERS.

APPLICATION FILED FEB. 23. 1921.

Patented Apr. 4

wrmss: I

W. J. MILLER.

CALIPERS.

APPLICATION FILED FEB. 23, I921- Patented Apr. 4, 1922.

2 SHEETS-SHEET 2.

W.II.MLLer INVEN OR ATTORNEY WITNBU:

UNITED STATES rarsu'r orr ce.

WILLIAM JAMES MILLER, OF GOOSE CREEK, TEXAS.

CALIPERS.

arness.

To all whom it may concern."

Be it known that 1, WILLIAM J. lllinrinn,

- a citizen of the United States, residing at Goose Creek, in the countyof Harris and State of Texas, have invented new and use ful Improvementsin Calipers, of whlch the following is a specification.

This invention relates to improvements in calipers, the principal objectof the invention being to provide one arm of the calipers with a steeltape so arranged that the distance between the ends of the arms can bemeasured by said tape.

Another object of the invention is to provide means whereby the tape canbe carried in rolled condition in the calipers when not in use.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is an elevation of the invention showing the tape in partly extendedposition.

Figure 2 is a sectional view through the tape carrying arm of thecalipers.

Figure 3 is a section on line 33 of F 1gure 1.

Figures 4- and 5 are detail views.

Figure 6 is a sectional view through that part of the hollow arm whichcarries the spool.

In these views A indicates the calipers which are constructed in themore ordinary manner excepting that one arm is madeof considerable widthand is provided with a chamber 1 intermediate its ends and a slot 2which extends from the chamber through the free end of the arm. Sideplates 3 are secured to the arm by the screws 4, these plates coveringthe chamber and the major portion of the slot. A spool 5 1s journaled inchamber 1 by means of the screw bolt 6 passing through the spool and theplates 3. This spool supports the tape 7 whlch is preferably made ofsteel and said tape is kept wound upon the spool by means of the coilspring 8. The free end of the Specification. of Letters Patent.

Application filed February 23, 1921.

atentecl Apr. 4, 1922.

$eria1 No. 447,189. C l

tape is provided with a part 9 which may be welded thereto and whichacts as a thumb hold and as a stop for engaging the end of the calipersarm for preventing the outer part of the tape from being drawn throughthe slot and upon the spool. By placing the thumb against thisprojecting part the tape can be unwound from the spool and drawn throughthe slot.

Ialso provide means for holding the tape in its adjusted position orpartly withdrawn from the slot, such means consisting of a thumb screw10 rotatably mounted in the small end of the calipers adjacent the slotand having a fiat part 11 which can be brought in alignment with onewall of the slot so as to permit free movement of the tape but when thescrew is turned the rounded part will press the tape against the upperwall of the slot and thus clamp the same and prevent the spring spoolfrom drawing the tape inwardly.

It will thus be seen that the tape can be used in measuring thedistancesbetween the ends of the calipers arms, the thumb screw 10holding the tape in its adjusted position so that the user can readilyread the figures on the tape. Of course the tape can be used formeasuring other distances if desired.

I prefer to use a tape marked as indicated in Figure 5 which shows thecentral part of the tape left blank but with the lines separating theinches passing entirely across the face of the tape. This blank centralspace is engaged by the end of the calipers arm.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claims.

What I claim is 1. Calipers having pivoted arms, one of which is hollow,a spool located in said hollow arm and a graduated tape carried by thespool and adjustable toward the free end of the other arm and throughthe free end of the hollow arm.

2. Calipers having pivoted arms, one of which is hollow, a springactuated spool in the spool adjustable toward. the free end of the otherarm and through the free end of the hollow arm. 1 3. Calipers havingpivoted arms, one of 5 which is provided with a chamber and a ilongitudinally extending slot, said slot passing through the free end ofthe arm, side plates for closing said chamber and'slot, a

spring actuated spool in said chamber, a graduated tape carried by thespool and 10 passing through the slot, a stop at the free end of thetape for engaging the end of the arm and means for holding the tape inadjusted position.

In testimony whereof I afiix my si ature.

WILLIAM JAMES MIL ER.

